§439.4. General limitation or standard for pH.
40 C.F.R. § 439.4
The pH must remain within the range 6.0 to 9.0 in any discharge subject to BPT, BCT or NSPS limitations or standards in this part.
Notes, amendments, and revision history
Amendments
[68 FR 12271, Mar. 13, 2003]
Authority
Authority: 33 U.S.C. 1311, 1314, 1316, 1317, 1318, 1342 and 1361.
Source
Source: 48 FR 49821, Oct. 27, 1983, unless otherwise noted.
Amendments
[68 FR 12271, Mar. 13, 2003]